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=159/2= (A) 78,5
39.) rata rata tangkapannya : 9+10+9+8+7=43
=43/5=(A) 8,6 ton
40.) selisih kerbau dan sapi : - 24/100 x 2000=480
- 21/100 x 2000 =420
selisih = 480-420=(A) 60 ekor
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